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⚡️ Step 3.5 Flash is coming: Fast Enough to Think. Reliable Enough to Act！ We’re dropping our most capable open-source foundation model yet. Frontier reasoning meets extreme efficiency. It leverages a sparse Mixture of Experts (MoE) architecture, 196B total → 11B active. Key Capabilities: ✅Reasoning at Speed: MTP-3 powered throughput at 100–300 tok/s (350 tok/s peak for single-stream coding tasks). ✅Agentic Power: ⚡️ 74.4% SWE-bench Verified ⚡️ 51.0% Terminal-Bench 2.0. Proven stability for complex, long-horizon tasks. ✅256K Efficient Context: 3:1 SWA ratio + Full Attention. Massive datasets or long codebases support with minimal overhead. Consistent performance, hybrid efficiency. ✅Local-First Deployment: Optimized for Mac Studio M4 Max, NVIDIA DGX Spark. Secure, private, and frontier-capable. Your data, your hardware, your agent. You can try Step 3.5 Flash right now: 👉 OpenRouter: <a target="_blank" href="https://openrouter.ai/stepfun/step-3.5-flash:free" color="blue">openrouter.ai/stepfun/step-3…</a> 👉 GitHub: <a target="_blank" href="https://github.com/stepfun-ai/Step-3.5-Flash" color="blue">github.com/stepfun-ai/Ste…</a> 👉 HuggingFace：<a target="_blank" href="https://huggingface.co/stepfun-ai/Step-3.5-Flash" color="blue">huggingface.co/stepfun-ai/Ste…</a> 👉 Blog：<a target="_blank" href="https://static.stepfun.com/blog/step-3.5-flash/" color="blue">static.stepfun.com/blog/step-3.5-…</a> 👉 ModelScope: <a target="_blank" href="https://modelscope.cn/models/stepfun-ai/Step-3.5-Flash" color="blue">modelscope.cn/models/stepfun…</a> 🌌 The Next：Step 4 training is officially LIVE！ We're calling on the world's boldest builders to co-creat the Step 4 right now. Let's define the Agentic Era together! Join our Discord：<a target="_blank" href="https://discord.gg/RcMJhNVAQc" color="blue">discord.gg/RcMJhNVAQc</a>
Try Step 3.5 Flash on NV NIM👉 <a target="_blank" href="https://build.nvidia.com/stepfun-ai/step-3.5-flash" color="blue">build.nvidia.com/stepfun-ai/ste…</a>
huggingface🤗 mtp3_bf16: <a target="_blank" href="https://huggingface.co/stepfun-ai/Step-3.5-Flash" color="blue">huggingface.co/stepfun-ai/Ste…</a> mtp3_fp8: <a target="_blank" href="https://huggingface.co/stepfun-ai/Step-3.5-Flash-FP8" color="blue">huggingface.co/stepfun-ai/Ste…</a> int4: <a target="_blank" href="https://huggingface.co/stepfun-ai/Step-3.5-Flash-Int4" color="blue">huggingface.co/stepfun-ai/Ste…</a>